Teoria y Estructura Atómica The Periodic Table of Elements IV: Chemical families por Katie Grace Carpenter, M.S. Lectura Prueba Enseñe con esto 1. What change was brought about by the 2007 meteor impact in Peru? The meteor impact was the first evidence of arsenic toxicity. The impact brought about greater awareness of widespread arsenic toxicity in Peru and beyond. The impact inspired the development of the periodic table. The meteor impact led to arsenic being classified as a metalloid. 2. Elements high in metallic character tend to readily lose electrons to other atoms. true false 3. How does electron configuration explain chemical similarities between arsenic and phosphorus? Arsenic (As) and phosphorus (P) have similar valence electron configurations. Arsenic (As) and phosphorus (P) have the same electron configuration. The electron configuration of phosphorus (P) is opposite that of arsenic (As). The valence electron configuration of arsenic (As) is opposite that of phosphorus (P). 4. What is the name for the chemical family indicated on the image? Noble gases Transition metals Alkali earth metals Alkali metals 5. Which of the following orders four chemical families from highest to lowest in metallic character? Halogens -- Reactive nonmetals -- Transition metals -- Alkali metals Alkali earth metals -- Alkali metals -- Reactive nonmetals -- Halogens Alkali earth metals -- Transition metals -- Reactive nonmetals -- Halogens Halogens -- Alkali metals -- Transition metals -- Reactive nonmetals 6. Based on periodic table trends, which of the following would you expect to carry out chemical reactions similar to barium (Ba)? Radium (Ra) Phosphorus (P) Arsenic (As) Cesium (Cs) 7. Metals generally have higher reactivity than nonmetal elements. true false 8. Which of the following pairs share the following electron configuration: 1s2 2s2 2p6 sodium ion (Na+) and neon (Ne) sodium ion (Na+) and neon ion (Ne+) sodium (Na) and neon (Ne) sodium ion (Na) and neon ion (Ne+) 9. Which chemical family is the least reactive of the periodic table? Halogens Noble gases Lanthanides Transition metals 10. Which of the following most completely explains the toxicity of radium (Ra)? The element radium has similar chemical reactivity to phosphorus (P). Radium (Ra) is radioactive and can damage tissue without proper protection. The element radium (Ra) has similar chemical reactivity to phosphorus (P), which explains its radioactivity. The radioactive element radium (Ra) can be mistaken for calcium (Ca) in biochemical reactions, leading to its incorporation into and damage of bone tissue. Resultados de Prueba
